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FFmpeg/libavdevice/avfoundation.m
Andreas Rheinhardt 790f793844 avutil/common: Don't auto-include mem.h 
There are lots of files that don't need it: The number of object
files that actually need it went down from 2011 to 884 here.

Keep it for external users in order to not cause breakages.

Also improve the other headers a bit while just at it.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-31 00:08:43 +01:00

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/*
* AVFoundation input device
* Copyright (c) 2014 Thilo Borgmann <thilo.borgmann@mail.de>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file
* AVFoundation input device
* @author Thilo Borgmann <thilo.borgmann@mail.de>
*/
#import <AVFoundation/AVFoundation.h>
#include <pthread.h>
#include "libavutil/channel_layout.h"
#include "libavutil/mem.h"
#include "libavutil/pixdesc.h"
#include "libavutil/opt.h"
#include "libavutil/avstring.h"
#include "libavformat/demux.h"
#include "libavformat/internal.h"
#include "libavutil/internal.h"
#include "libavutil/parseutils.h"
#include "libavutil/time.h"
#include "libavutil/imgutils.h"
#include "avdevice.h"
static const int avf_time_base = 1000000;
static const AVRational avf_time_base_q = {
.num = 1,
.den = avf_time_base
};
struct AVFPixelFormatSpec {
enum AVPixelFormat ff_id;
OSType avf_id;
};
static const struct AVFPixelFormatSpec avf_pixel_formats[] = {
{ AV_PIX_FMT_MONOBLACK, kCVPixelFormatType_1Monochrome },
{ AV_PIX_FMT_RGB555BE, kCVPixelFormatType_16BE555 },
{ AV_PIX_FMT_RGB555LE, kCVPixelFormatType_16LE555 },
{ AV_PIX_FMT_RGB565BE, kCVPixelFormatType_16BE565 },
{ AV_PIX_FMT_RGB565LE, kCVPixelFormatType_16LE565 },
{ AV_PIX_FMT_RGB24, kCVPixelFormatType_24RGB },
{ AV_PIX_FMT_BGR24, kCVPixelFormatType_24BGR },
{ AV_PIX_FMT_0RGB, kCVPixelFormatType_32ARGB },
{ AV_PIX_FMT_BGR0, kCVPixelFormatType_32BGRA },
{ AV_PIX_FMT_0BGR, kCVPixelFormatType_32ABGR },
{ AV_PIX_FMT_RGB0, kCVPixelFormatType_32RGBA },
{ AV_PIX_FMT_BGR48BE, kCVPixelFormatType_48RGB },
{ AV_PIX_FMT_UYVY422, kCVPixelFormatType_422YpCbCr8 },
{ AV_PIX_FMT_YUVA444P, kCVPixelFormatType_4444YpCbCrA8R },
{ AV_PIX_FMT_YUVA444P16LE, kCVPixelFormatType_4444AYpCbCr16 },
{ AV_PIX_FMT_YUV444P, kCVPixelFormatType_444YpCbCr8 },
{ AV_PIX_FMT_YUV422P16, kCVPixelFormatType_422YpCbCr16 },
{ AV_PIX_FMT_YUV422P10, kCVPixelFormatType_422YpCbCr10 },
{ AV_PIX_FMT_YUV444P10, kCVPixelFormatType_444YpCbCr10 },
{ AV_PIX_FMT_YUV420P, kCVPixelFormatType_420YpCbCr8Planar },
{ AV_PIX_FMT_NV12, kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange },
{ AV_PIX_FMT_YUYV422, kCVPixelFormatType_422YpCbCr8_yuvs },
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
{ AV_PIX_FMT_GRAY8, kCVPixelFormatType_OneComponent8 },
#endif
{ AV_PIX_FMT_NONE, 0 }
};
typedef struct
{
AVClass* class;
int frames_captured;
int audio_frames_captured;
pthread_mutex_t frame_lock;
id avf_delegate;
id avf_audio_delegate;
AVRational framerate;
int width, height;
int capture_cursor;
int capture_mouse_clicks;
int capture_raw_data;
int drop_late_frames;
int video_is_muxed;
int video_is_screen;
int list_devices;
int video_device_index;
int video_stream_index;
int audio_device_index;
int audio_stream_index;
char *url;
char *video_filename;
char *audio_filename;
int num_video_devices;
int audio_channels;
int audio_bits_per_sample;
int audio_float;
int audio_be;
int audio_signed_integer;
int audio_packed;
int audio_non_interleaved;
int32_t *audio_buffer;
int audio_buffer_size;
enum AVPixelFormat pixel_format;
AVCaptureSession *capture_session;
AVCaptureVideoDataOutput *video_output;
AVCaptureAudioDataOutput *audio_output;
CMSampleBufferRef current_frame;
CMSampleBufferRef current_audio_frame;
AVCaptureDevice *observed_device;
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
AVCaptureDeviceTransportControlsPlaybackMode observed_mode;
#endif
int observed_quit;
} AVFContext;
static void lock_frames(AVFContext* ctx)
{
pthread_mutex_lock(&ctx->frame_lock);
}
static void unlock_frames(AVFContext* ctx)
{
pthread_mutex_unlock(&ctx->frame_lock);
}
/** FrameReciever class - delegate for AVCaptureSession
*/
@interface AVFFrameReceiver : NSObject
{
AVFContext* _context;
}
- (id)initWithContext:(AVFContext*)context;
- (void) captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)videoFrame
fromConnection:(AVCaptureConnection *)connection;
@end
@implementation AVFFrameReceiver
- (id)initWithContext:(AVFContext*)context
{
if (self = [super init]) {
_context = context;
// start observing if a device is set for it
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
if (_context->observed_device) {
NSString *keyPath = NSStringFromSelector(@selector(transportControlsPlaybackMode));
NSKeyValueObservingOptions options = NSKeyValueObservingOptionNew;
[_context->observed_device addObserver: self
forKeyPath: keyPath
options: options
context: _context];
}
#endif
}
return self;
}
- (void)dealloc {
// stop observing if a device is set for it
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
if (_context->observed_device) {
NSString *keyPath = NSStringFromSelector(@selector(transportControlsPlaybackMode));
[_context->observed_device removeObserver: self forKeyPath: keyPath];
}
#endif
[super dealloc];
}
- (void)observeValueForKeyPath:(NSString *)keyPath
ofObject:(id)object
change:(NSDictionary *)change
context:(void *)context {
if (context == _context) {
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
AVCaptureDeviceTransportControlsPlaybackMode mode =
[change[NSKeyValueChangeNewKey] integerValue];
if (mode != _context->observed_mode) {
if (mode == AVCaptureDeviceTransportControlsNotPlayingMode) {
_context->observed_quit = 1;
}
_context->observed_mode = mode;
}
#endif
} else {
[super observeValueForKeyPath: keyPath
ofObject: object
change: change
context: context];
}
}
- (void) captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)videoFrame
fromConnection:(AVCaptureConnection *)connection
{
lock_frames(_context);
if (_context->current_frame != nil) {
CFRelease(_context->current_frame);
}
_context->current_frame = (CMSampleBufferRef)CFRetain(videoFrame);
unlock_frames(_context);
++_context->frames_captured;
}
@end
/** AudioReciever class - delegate for AVCaptureSession
*/
@interface AVFAudioReceiver : NSObject
{
AVFContext* _context;
}
- (id)initWithContext:(AVFContext*)context;
- (void) captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)audioFrame
fromConnection:(AVCaptureConnection *)connection;
@end
@implementation AVFAudioReceiver
- (id)initWithContext:(AVFContext*)context
{
if (self = [super init]) {
_context = context;
}
return self;
}
- (void) captureOutput:(AVCaptureOutput *)captureOutput
didOutputSampleBuffer:(CMSampleBufferRef)audioFrame
fromConnection:(AVCaptureConnection *)connection
{
lock_frames(_context);
if (_context->current_audio_frame != nil) {
CFRelease(_context->current_audio_frame);
}
_context->current_audio_frame = (CMSampleBufferRef)CFRetain(audioFrame);
unlock_frames(_context);
++_context->audio_frames_captured;
}
@end
static void destroy_context(AVFContext* ctx)
{
[ctx->capture_session stopRunning];
[ctx->capture_session release];
[ctx->video_output release];
[ctx->audio_output release];
[ctx->avf_delegate release];
[ctx->avf_audio_delegate release];
ctx->capture_session = NULL;
ctx->video_output = NULL;
ctx->audio_output = NULL;
ctx->avf_delegate = NULL;
ctx->avf_audio_delegate = NULL;
av_freep(&ctx->url);
av_freep(&ctx->audio_buffer);
pthread_mutex_destroy(&ctx->frame_lock);
if (ctx->current_frame) {
CFRelease(ctx->current_frame);
}
}
static int parse_device_name(AVFormatContext *s)
{
AVFContext *ctx = (AVFContext*)s->priv_data;
char *save;
ctx->url = av_strdup(s->url);
if (!ctx->url)
return AVERROR(ENOMEM);
if (ctx->url[0] != ':') {
ctx->video_filename = av_strtok(ctx->url, ":", &save);
ctx->audio_filename = av_strtok(NULL, ":", &save);
} else {
ctx->audio_filename = av_strtok(ctx->url, ":", &save);
}
return 0;
}
/**
* Configure the video device.
*
* Configure the video device using a run-time approach to access properties
* since formats, activeFormat are available since iOS >= 7.0 or OSX >= 10.7
* and activeVideoMaxFrameDuration is available since i0S >= 7.0 and OSX >= 10.9.
*
* The NSUndefinedKeyException must be handled by the caller of this function.
*
*/
static int configure_video_device(AVFormatContext *s, AVCaptureDevice *video_device)
{
AVFContext *ctx = (AVFContext*)s->priv_data;
double framerate = av_q2d(ctx->framerate);
NSObject *range = nil;
NSObject *format = nil;
NSObject *selected_range = nil;
NSObject *selected_format = nil;
// try to configure format by formats list
// might raise an exception if no format list is given
// (then fallback to default, no configuration)
@try {
for (format in [video_device valueForKey:@"formats"]) {
CMFormatDescriptionRef formatDescription;
CMVideoDimensions dimensions;
formatDescription = (CMFormatDescriptionRef) [format performSelector:@selector(formatDescription)];
dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
if ((ctx->width == 0 && ctx->height == 0) ||
(dimensions.width == ctx->width && dimensions.height == ctx->height)) {
selected_format = format;
for (range in [format valueForKey:@"videoSupportedFrameRateRanges"]) {
double max_framerate;
[[range valueForKey:@"maxFrameRate"] getValue:&max_framerate];
if (fabs (framerate - max_framerate) < 0.01) {
selected_range = range;
break;
}
}
}
}
if (!selected_format) {
av_log(s, AV_LOG_ERROR, "Selected video size (%dx%d) is not supported by the device.\n",
ctx->width, ctx->height);
goto unsupported_format;
}
if (!selected_range) {
av_log(s, AV_LOG_ERROR, "Selected framerate (%f) is not supported by the device.\n",
framerate);
if (ctx->video_is_muxed) {
av_log(s, AV_LOG_ERROR, "Falling back to default.\n");
} else {
goto unsupported_format;
}
}
if ([video_device lockForConfiguration:NULL] == YES) {
if (selected_format) {
[video_device setValue:selected_format forKey:@"activeFormat"];
}
if (selected_range) {
NSValue *min_frame_duration = [selected_range valueForKey:@"minFrameDuration"];
[video_device setValue:min_frame_duration forKey:@"activeVideoMinFrameDuration"];
[video_device setValue:min_frame_duration forKey:@"activeVideoMaxFrameDuration"];
}
} else {
av_log(s, AV_LOG_ERROR, "Could not lock device for configuration.\n");
return AVERROR(EINVAL);
}
} @catch(NSException *e) {
av_log(ctx, AV_LOG_WARNING, "Configuration of video device failed, falling back to default.\n");
}
return 0;
unsupported_format:
av_log(s, AV_LOG_ERROR, "Supported modes:\n");
for (format in [video_device valueForKey:@"formats"]) {
CMFormatDescriptionRef formatDescription;
CMVideoDimensions dimensions;
formatDescription = (CMFormatDescriptionRef) [format performSelector:@selector(formatDescription)];
dimensions = CMVideoFormatDescriptionGetDimensions(formatDescription);
for (range in [format valueForKey:@"videoSupportedFrameRateRanges"]) {
double min_framerate;
double max_framerate;
[[range valueForKey:@"minFrameRate"] getValue:&min_framerate];
[[range valueForKey:@"maxFrameRate"] getValue:&max_framerate];
av_log(s, AV_LOG_ERROR, " %dx%d@[%f %f]fps\n",
dimensions.width, dimensions.height,
min_framerate, max_framerate);
}
}
return AVERROR(EINVAL);
}
static int add_video_device(AVFormatContext *s, AVCaptureDevice *video_device)
{
AVFContext *ctx = (AVFContext*)s->priv_data;
int ret;
NSError *error = nil;
AVCaptureInput* capture_input = nil;
struct AVFPixelFormatSpec pxl_fmt_spec;
NSNumber *pixel_format;
NSDictionary *capture_dict;
dispatch_queue_t queue;
if (ctx->video_device_index < ctx->num_video_devices) {
capture_input = (AVCaptureInput*) [[[AVCaptureDeviceInput alloc] initWithDevice:video_device error:&error] autorelease];
} else {
capture_input = (AVCaptureInput*) video_device;
}
if (!capture_input) {
av_log(s, AV_LOG_ERROR, "Failed to create AV capture input device: %s\n",
[[error localizedDescription] UTF8String]);
return 1;
}
if ([ctx->capture_session canAddInput:capture_input]) {
[ctx->capture_session addInput:capture_input];
} else {
av_log(s, AV_LOG_ERROR, "can't add video input to capture session\n");
return 1;
}
// Attaching output
ctx->video_output = [[AVCaptureVideoDataOutput alloc] init];
if (!ctx->video_output) {
av_log(s, AV_LOG_ERROR, "Failed to init AV video output\n");
return 1;
}
// Configure device framerate and video size
@try {
if ((ret = configure_video_device(s, video_device)) < 0) {
return ret;
}
} @catch (NSException *exception) {
if (![[exception name] isEqualToString:NSUndefinedKeyException]) {
av_log (s, AV_LOG_ERROR, "An error occurred: %s", [exception.reason UTF8String]);
return AVERROR_EXTERNAL;
}
}
// select pixel format
pxl_fmt_spec.ff_id = AV_PIX_FMT_NONE;
for (int i = 0; avf_pixel_formats[i].ff_id != AV_PIX_FMT_NONE; i++) {
if (ctx->pixel_format == avf_pixel_formats[i].ff_id) {
pxl_fmt_spec = avf_pixel_formats[i];
break;
}
}
// check if selected pixel format is supported by AVFoundation
if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
av_log(s, AV_LOG_ERROR, "Selected pixel format (%s) is not supported by AVFoundation.\n",
av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
return 1;
}
// check if the pixel format is available for this device
if ([[ctx->video_output availableVideoCVPixelFormatTypes] indexOfObject:[NSNumber numberWithInt:pxl_fmt_spec.avf_id]] == NSNotFound) {
av_log(s, AV_LOG_ERROR, "Selected pixel format (%s) is not supported by the input device.\n",
av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
pxl_fmt_spec.ff_id = AV_PIX_FMT_NONE;
av_log(s, AV_LOG_ERROR, "Supported pixel formats:\n");
for (NSNumber *pxl_fmt in [ctx->video_output availableVideoCVPixelFormatTypes]) {
struct AVFPixelFormatSpec pxl_fmt_dummy;
pxl_fmt_dummy.ff_id = AV_PIX_FMT_NONE;
for (int i = 0; avf_pixel_formats[i].ff_id != AV_PIX_FMT_NONE; i++) {
if ([pxl_fmt intValue] == avf_pixel_formats[i].avf_id) {
pxl_fmt_dummy = avf_pixel_formats[i];
break;
}
}
if (pxl_fmt_dummy.ff_id != AV_PIX_FMT_NONE) {
av_log(s, AV_LOG_ERROR, " %s\n", av_get_pix_fmt_name(pxl_fmt_dummy.ff_id));
// select first supported pixel format instead of user selected (or default) pixel format
if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
pxl_fmt_spec = pxl_fmt_dummy;
}
}
}
// fail if there is no appropriate pixel format or print a warning about overriding the pixel format
if (pxl_fmt_spec.ff_id == AV_PIX_FMT_NONE) {
return 1;
} else {
av_log(s, AV_LOG_WARNING, "Overriding selected pixel format to use %s instead.\n",
av_get_pix_fmt_name(pxl_fmt_spec.ff_id));
}
}
// set videoSettings to an empty dict for receiving raw data of muxed devices
if (ctx->capture_raw_data) {
ctx->pixel_format = pxl_fmt_spec.ff_id;
ctx->video_output.videoSettings = @{ };
} else {
ctx->pixel_format = pxl_fmt_spec.ff_id;
pixel_format = [NSNumber numberWithUnsignedInt:pxl_fmt_spec.avf_id];
capture_dict = [NSDictionary dictionaryWithObject:pixel_format
forKey:(id)kCVPixelBufferPixelFormatTypeKey];
[ctx->video_output setVideoSettings:capture_dict];
}
[ctx->video_output setAlwaysDiscardsLateVideoFrames:ctx->drop_late_frames];
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
// check for transport control support and set observer device if supported
if (!ctx->video_is_screen) {
int trans_ctrl = [video_device transportControlsSupported];
AVCaptureDeviceTransportControlsPlaybackMode trans_mode = [video_device transportControlsPlaybackMode];
if (trans_ctrl) {
ctx->observed_mode = trans_mode;
ctx->observed_device = video_device;
}
}
#endif
ctx->avf_delegate = [[AVFFrameReceiver alloc] initWithContext:ctx];
queue = dispatch_queue_create("avf_queue", NULL);
[ctx->video_output setSampleBufferDelegate:ctx->avf_delegate queue:queue];
dispatch_release(queue);
if ([ctx->capture_session canAddOutput:ctx->video_output]) {
[ctx->capture_session addOutput:ctx->video_output];
} else {
av_log(s, AV_LOG_ERROR, "can't add video output to capture session\n");
return 1;
}
return 0;
}
static int add_audio_device(AVFormatContext *s, AVCaptureDevice *audio_device)
{
AVFContext *ctx = (AVFContext*)s->priv_data;
NSError *error = nil;
AVCaptureDeviceInput* audio_dev_input = [[[AVCaptureDeviceInput alloc] initWithDevice:audio_device error:&error] autorelease];
dispatch_queue_t queue;
if (!audio_dev_input) {
av_log(s, AV_LOG_ERROR, "Failed to create AV capture input device: %s\n",
[[error localizedDescription] UTF8String]);
return 1;
}
if ([ctx->capture_session canAddInput:audio_dev_input]) {
[ctx->capture_session addInput:audio_dev_input];
} else {
av_log(s, AV_LOG_ERROR, "can't add audio input to capture session\n");
return 1;
}
// Attaching output
ctx->audio_output = [[AVCaptureAudioDataOutput alloc] init];
if (!ctx->audio_output) {
av_log(s, AV_LOG_ERROR, "Failed to init AV audio output\n");
return 1;
}
ctx->avf_audio_delegate = [[AVFAudioReceiver alloc] initWithContext:ctx];
queue = dispatch_queue_create("avf_audio_queue", NULL);
[ctx->audio_output setSampleBufferDelegate:ctx->avf_audio_delegate queue:queue];
dispatch_release(queue);
if ([ctx->capture_session canAddOutput:ctx->audio_output]) {
[ctx->capture_session addOutput:ctx->audio_output];
} else {
av_log(s, AV_LOG_ERROR, "adding audio output to capture session failed\n");
return 1;
}
return 0;
}
static int get_video_config(AVFormatContext *s)
{
AVFContext *ctx = (AVFContext*)s->priv_data;
CVImageBufferRef image_buffer;
CMBlockBufferRef block_buffer;
CGSize image_buffer_size;
AVStream* stream = avformat_new_stream(s, NULL);
if (!stream) {
return 1;
}
// Take stream info from the first frame.
while (ctx->frames_captured < 1) {
CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, YES);
}
lock_frames(ctx);
ctx->video_stream_index = stream->index;
avpriv_set_pts_info(stream, 64, 1, avf_time_base);
image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame);
block_buffer = CMSampleBufferGetDataBuffer(ctx->current_frame);
if (image_buffer) {
image_buffer_size = CVImageBufferGetEncodedSize(image_buffer);
stream->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
stream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
stream->codecpar->width = (int)image_buffer_size.width;
stream->codecpar->height = (int)image_buffer_size.height;
stream->codecpar->format = ctx->pixel_format;
} else {
stream->codecpar->codec_id = AV_CODEC_ID_DVVIDEO;
stream->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
stream->codecpar->format = ctx->pixel_format;
}
CFRelease(ctx->current_frame);
ctx->current_frame = nil;
unlock_frames(ctx);
return 0;
}
static int get_audio_config(AVFormatContext *s)
{
AVFContext *ctx = (AVFContext*)s->priv_data;
CMFormatDescriptionRef format_desc;
AVStream* stream = avformat_new_stream(s, NULL);
if (!stream) {
return 1;
}
// Take stream info from the first frame.
while (ctx->audio_frames_captured < 1) {
CFRunLoopRunInMode(kCFRunLoopDefaultMode, 0.1, YES);
}
lock_frames(ctx);
ctx->audio_stream_index = stream->index;
avpriv_set_pts_info(stream, 64, 1, avf_time_base);
format_desc = CMSampleBufferGetFormatDescription(ctx->current_audio_frame);
const AudioStreamBasicDescription *basic_desc = CMAudioFormatDescriptionGetStreamBasicDescription(format_desc);
if (!basic_desc) {
unlock_frames(ctx);
av_log(s, AV_LOG_ERROR, "audio format not available\n");
return 1;
}
stream->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
stream->codecpar->sample_rate = basic_desc->mSampleRate;
av_channel_layout_default(&stream->codecpar->ch_layout, basic_desc->mChannelsPerFrame);
ctx->audio_channels = basic_desc->mChannelsPerFrame;
ctx->audio_bits_per_sample = basic_desc->mBitsPerChannel;
ctx->audio_float = basic_desc->mFormatFlags & kAudioFormatFlagIsFloat;
ctx->audio_be = basic_desc->mFormatFlags & kAudioFormatFlagIsBigEndian;
ctx->audio_signed_integer = basic_desc->mFormatFlags & kAudioFormatFlagIsSignedInteger;
ctx->audio_packed = basic_desc->mFormatFlags & kAudioFormatFlagIsPacked;
ctx->audio_non_interleaved = basic_desc->mFormatFlags & kAudioFormatFlagIsNonInterleaved;
if (basic_desc->mFormatID == kAudioFormatLinearPCM &&
ctx->audio_float &&
ctx->audio_bits_per_sample == 32 &&
ctx->audio_packed) {
stream->codecpar->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_F32BE : AV_CODEC_ID_PCM_F32LE;
} else if (basic_desc->mFormatID == kAudioFormatLinearPCM &&
ctx->audio_signed_integer &&
ctx->audio_bits_per_sample == 16 &&
ctx->audio_packed) {
stream->codecpar->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_S16BE : AV_CODEC_ID_PCM_S16LE;
} else if (basic_desc->mFormatID == kAudioFormatLinearPCM &&
ctx->audio_signed_integer &&
ctx->audio_bits_per_sample == 24 &&
ctx->audio_packed) {
stream->codecpar->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_S24BE : AV_CODEC_ID_PCM_S24LE;
} else if (basic_desc->mFormatID == kAudioFormatLinearPCM &&
ctx->audio_signed_integer &&
ctx->audio_bits_per_sample == 32 &&
ctx->audio_packed) {
stream->codecpar->codec_id = ctx->audio_be ? AV_CODEC_ID_PCM_S32BE : AV_CODEC_ID_PCM_S32LE;
} else {
unlock_frames(ctx);
av_log(s, AV_LOG_ERROR, "audio format is not supported\n");
return 1;
}
if (ctx->audio_non_interleaved) {
CMBlockBufferRef block_buffer = CMSampleBufferGetDataBuffer(ctx->current_audio_frame);
ctx->audio_buffer_size = CMBlockBufferGetDataLength(block_buffer);
ctx->audio_buffer = av_malloc(ctx->audio_buffer_size);
if (!ctx->audio_buffer) {
unlock_frames(ctx);
av_log(s, AV_LOG_ERROR, "error allocating audio buffer\n");
return 1;
}
}
CFRelease(ctx->current_audio_frame);
ctx->current_audio_frame = nil;
unlock_frames(ctx);
return 0;
}
static NSArray* getDevicesWithMediaType(AVMediaType mediaType) {
#if ((TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED >= 100000) || (TARGET_OS_OSX && __MAC_OS_X_VERSION_MIN_REQUIRED >= 101500))
NSMutableArray *deviceTypes = nil;
if (mediaType == AVMediaTypeVideo) {
deviceTypes = [NSMutableArray arrayWithArray:@[AVCaptureDeviceTypeBuiltInWideAngleCamera]];
#if (TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED >= 100000)
[deviceTypes addObject: AVCaptureDeviceTypeBuiltInDualCamera];
[deviceTypes addObject: AVCaptureDeviceTypeBuiltInTelephotoCamera];
#endif
#if (TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED >= 110100)
[deviceTypes addObject: AVCaptureDeviceTypeBuiltInTrueDepthCamera];
#endif
#if (TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED >= 130000)
[deviceTypes addObject: AVCaptureDeviceTypeBuiltInTripleCamera];
[deviceTypes addObject: AVCaptureDeviceTypeBuiltInDualWideCamera];
[deviceTypes addObject: AVCaptureDeviceTypeBuiltInUltraWideCamera];
#endif
#if (TARGET_OS_OSX && __MAC_OS_X_VERSION_MIN_REQUIRED >= 130000)
[deviceTypes addObject: AVCaptureDeviceTypeDeskViewCamera];
#endif
#if (TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED >= 150400)
[deviceTypes addObject: AVCaptureDeviceTypeBuiltInLiDARDepthCamera];
#endif
#if (TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED >= 170000 || (TARGET_OS_OSX && __MAC_OS_X_VERSION_MIN_REQUIRED >= 140000))
[deviceTypes addObject: AVCaptureDeviceTypeContinuityCamera];
#endif
} else if (mediaType == AVMediaTypeAudio) {
#if (TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED >= 170000 || (TARGET_OS_OSX && __MAC_OS_X_VERSION_MIN_REQUIRED >= 140000))
deviceTypes = [NSMutableArray arrayWithArray:@[AVCaptureDeviceTypeMicrophone]];
#else
deviceTypes = [NSMutableArray arrayWithArray:@[AVCaptureDeviceTypeBuiltInMicrophone]];
#endif
} else if (mediaType == AVMediaTypeMuxed) {
#if (TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED >= 170000 || (TARGET_OS_OSX && __MAC_OS_X_VERSION_MIN_REQUIRED >= 140000))
deviceTypes = [NSMutableArray arrayWithArray:@[AVCaptureDeviceTypeExternal]];
#elif (TARGET_OS_OSX && __MAC_OS_X_VERSION_MIN_REQUIRED < 140000)
deviceTypes = [NSMutableArray arrayWithArray:@[AVCaptureDeviceTypeExternalUnknown]];
#else
return nil;
#endif
} else {
return nil;
}
AVCaptureDeviceDiscoverySession *captureDeviceDiscoverySession =
[AVCaptureDeviceDiscoverySession
discoverySessionWithDeviceTypes:deviceTypes
mediaType:mediaType
position:AVCaptureDevicePositionUnspecified];
return [captureDeviceDiscoverySession devices];
#else
return [AVCaptureDevice devicesWithMediaType:mediaType];
#endif
}
static int avf_read_header(AVFormatContext *s)
{
int ret = 0;
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
uint32_t num_screens = 0;
AVFContext *ctx = (AVFContext*)s->priv_data;
AVCaptureDevice *video_device = nil;
AVCaptureDevice *audio_device = nil;
// Find capture device
NSArray *devices = getDevicesWithMediaType(AVMediaTypeVideo);
NSArray *devices_muxed = getDevicesWithMediaType(AVMediaTypeMuxed);
ctx->num_video_devices = [devices count] + [devices_muxed count];
pthread_mutex_init(&ctx->frame_lock, NULL);
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
CGGetActiveDisplayList(0, NULL, &num_screens);
#endif
// List devices if requested
if (ctx->list_devices) {
int index = 0;
av_log(ctx, AV_LOG_INFO, "AVFoundation video devices:\n");
for (AVCaptureDevice *device in devices) {
const char *name = [[device localizedName] UTF8String];
index = [devices indexOfObject:device];
av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name);
}
for (AVCaptureDevice *device in devices_muxed) {
const char *name = [[device localizedName] UTF8String];
index = [devices count] + [devices_muxed indexOfObject:device];
av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name);
}
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
if (num_screens > 0) {
CGDirectDisplayID screens[num_screens];
CGGetActiveDisplayList(num_screens, screens, &num_screens);
for (int i = 0; i < num_screens; i++) {
av_log(ctx, AV_LOG_INFO, "[%d] Capture screen %d\n", ctx->num_video_devices + i, i);
}
}
#endif
av_log(ctx, AV_LOG_INFO, "AVFoundation audio devices:\n");
devices = getDevicesWithMediaType(AVMediaTypeAudio);
for (AVCaptureDevice *device in devices) {
const char *name = [[device localizedName] UTF8String];
int index = [devices indexOfObject:device];
av_log(ctx, AV_LOG_INFO, "[%d] %s\n", index, name);
}
goto fail;
}
// parse input filename for video and audio device
ret = parse_device_name(s);
if (ret)
goto fail;
// check for device index given in filename
if (ctx->video_device_index == -1 && ctx->video_filename) {
sscanf(ctx->video_filename, "%d", &ctx->video_device_index);
}
if (ctx->audio_device_index == -1 && ctx->audio_filename) {
sscanf(ctx->audio_filename, "%d", &ctx->audio_device_index);
}
if (ctx->video_device_index >= 0) {
if (ctx->video_device_index < ctx->num_video_devices) {
if (ctx->video_device_index < [devices count]) {
video_device = [devices objectAtIndex:ctx->video_device_index];
} else {
video_device = [devices_muxed objectAtIndex:(ctx->video_device_index - [devices count])];
ctx->video_is_muxed = 1;
}
} else if (ctx->video_device_index < ctx->num_video_devices + num_screens) {
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
CGDirectDisplayID screens[num_screens];
CGGetActiveDisplayList(num_screens, screens, &num_screens);
AVCaptureScreenInput* capture_screen_input = [[[AVCaptureScreenInput alloc] initWithDisplayID:screens[ctx->video_device_index - ctx->num_video_devices]] autorelease];
if (ctx->framerate.num > 0) {
capture_screen_input.minFrameDuration = CMTimeMake(ctx->framerate.den, ctx->framerate.num);
}
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
if (ctx->capture_cursor) {
capture_screen_input.capturesCursor = YES;
} else {
capture_screen_input.capturesCursor = NO;
}
#endif
if (ctx->capture_mouse_clicks) {
capture_screen_input.capturesMouseClicks = YES;
} else {
capture_screen_input.capturesMouseClicks = NO;
}
video_device = (AVCaptureDevice*) capture_screen_input;
ctx->video_is_screen = 1;
#endif
} else {
av_log(ctx, AV_LOG_ERROR, "Invalid device index\n");
goto fail;
}
} else if (ctx->video_filename &&
strncmp(ctx->video_filename, "none", 4)) {
if (!strncmp(ctx->video_filename, "default", 7)) {
video_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
} else {
// looking for video inputs
for (AVCaptureDevice *device in devices) {
if (!strncmp(ctx->video_filename, [[device localizedName] UTF8String], strlen(ctx->video_filename))) {
video_device = device;
break;
}
}
// looking for muxed inputs
for (AVCaptureDevice *device in devices_muxed) {
if (!strncmp(ctx->video_filename, [[device localizedName] UTF8String], strlen(ctx->video_filename))) {
video_device = device;
ctx->video_is_muxed = 1;
break;
}
}
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
// looking for screen inputs
if (!video_device) {
int idx;
if(sscanf(ctx->video_filename, "Capture screen %d", &idx) && idx < num_screens) {
CGDirectDisplayID screens[num_screens];
CGGetActiveDisplayList(num_screens, screens, &num_screens);
AVCaptureScreenInput* capture_screen_input = [[[AVCaptureScreenInput alloc] initWithDisplayID:screens[idx]] autorelease];
video_device = (AVCaptureDevice*) capture_screen_input;
ctx->video_device_index = ctx->num_video_devices + idx;
ctx->video_is_screen = 1;
if (ctx->framerate.num > 0) {
capture_screen_input.minFrameDuration = CMTimeMake(ctx->framerate.den, ctx->framerate.num);
}
#if !TARGET_OS_IPHONE && __MAC_OS_X_VERSION_MIN_REQUIRED >= 1080
if (ctx->capture_cursor) {
capture_screen_input.capturesCursor = YES;
} else {
capture_screen_input.capturesCursor = NO;
}
#endif
if (ctx->capture_mouse_clicks) {
capture_screen_input.capturesMouseClicks = YES;
} else {
capture_screen_input.capturesMouseClicks = NO;
}
}
}
#endif
}
if (!video_device) {
av_log(ctx, AV_LOG_ERROR, "Video device not found\n");
goto fail;
}
}
// get audio device
if (ctx->audio_device_index >= 0) {
NSArray *devices = getDevicesWithMediaType(AVMediaTypeAudio);
if (ctx->audio_device_index >= [devices count]) {
av_log(ctx, AV_LOG_ERROR, "Invalid audio device index\n");
goto fail;
}
audio_device = [devices objectAtIndex:ctx->audio_device_index];
} else if (ctx->audio_filename &&
strncmp(ctx->audio_filename, "none", 4)) {
if (!strncmp(ctx->audio_filename, "default", 7)) {
audio_device = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeAudio];
} else {
NSArray *devices = getDevicesWithMediaType(AVMediaTypeAudio);
for (AVCaptureDevice *device in devices) {
if (!strncmp(ctx->audio_filename, [[device localizedName] UTF8String], strlen(ctx->audio_filename))) {
audio_device = device;
break;
}
}
}
if (!audio_device) {
av_log(ctx, AV_LOG_ERROR, "Audio device not found\n");
goto fail;
}
}
// Video nor Audio capture device not found, looking for AVMediaTypeVideo/Audio
if (!video_device && !audio_device) {
av_log(s, AV_LOG_ERROR, "No AV capture device found\n");
goto fail;
}
if (video_device) {
if (ctx->video_device_index < ctx->num_video_devices) {
av_log(s, AV_LOG_DEBUG, "'%s' opened\n", [[video_device localizedName] UTF8String]);
} else {
av_log(s, AV_LOG_DEBUG, "'%s' opened\n", [[video_device description] UTF8String]);
}
}
if (audio_device) {
av_log(s, AV_LOG_DEBUG, "audio device '%s' opened\n", [[audio_device localizedName] UTF8String]);
}
// Initialize capture session
ctx->capture_session = [[AVCaptureSession alloc] init];
if (video_device && add_video_device(s, video_device)) {
goto fail;
}
if (audio_device && add_audio_device(s, audio_device)) {
}
[ctx->capture_session startRunning];
/* Unlock device configuration only after the session is started so it
* does not reset the capture formats */
if (!ctx->video_is_screen) {
[video_device unlockForConfiguration];
}
if (video_device && get_video_config(s)) {
goto fail;
}
// set audio stream
if (audio_device && get_audio_config(s)) {
goto fail;
}
[pool release];
return 0;
fail:
[pool release];
destroy_context(ctx);
if (ret)
return ret;
return AVERROR(EIO);
}
static int copy_cvpixelbuffer(AVFormatContext *s,
CVPixelBufferRef image_buffer,
AVPacket *pkt)
{
AVFContext *ctx = s->priv_data;
int src_linesize[4];
const uint8_t *src_data[4];
int width = CVPixelBufferGetWidth(image_buffer);
int height = CVPixelBufferGetHeight(image_buffer);
int status;
memset(src_linesize, 0, sizeof(src_linesize));
memset(src_data, 0, sizeof(src_data));
status = CVPixelBufferLockBaseAddress(image_buffer, 0);
if (status != kCVReturnSuccess) {
av_log(s, AV_LOG_ERROR, "Could not lock base address: %d (%dx%d)\n", status, width, height);
return AVERROR_EXTERNAL;
}
if (CVPixelBufferIsPlanar(image_buffer)) {
size_t plane_count = CVPixelBufferGetPlaneCount(image_buffer);
int i;
for(i = 0; i < plane_count; i++){
src_linesize[i] = CVPixelBufferGetBytesPerRowOfPlane(image_buffer, i);
src_data[i] = CVPixelBufferGetBaseAddressOfPlane(image_buffer, i);
}
} else {
src_linesize[0] = CVPixelBufferGetBytesPerRow(image_buffer);
src_data[0] = CVPixelBufferGetBaseAddress(image_buffer);
}
status = av_image_copy_to_buffer(pkt->data, pkt->size,
src_data, src_linesize,
ctx->pixel_format, width, height, 1);
CVPixelBufferUnlockBaseAddress(image_buffer, 0);
return status;
}
static int avf_read_packet(AVFormatContext *s, AVPacket *pkt)
{
AVFContext* ctx = (AVFContext*)s->priv_data;
do {
CVImageBufferRef image_buffer;
CMBlockBufferRef block_buffer;
lock_frames(ctx);
if (ctx->current_frame != nil) {
int status;
int length = 0;
image_buffer = CMSampleBufferGetImageBuffer(ctx->current_frame);
block_buffer = CMSampleBufferGetDataBuffer(ctx->current_frame);
if (image_buffer != nil) {
length = (int)CVPixelBufferGetDataSize(image_buffer);
} else if (block_buffer != nil) {
length = (int)CMBlockBufferGetDataLength(block_buffer);
} else {
unlock_frames(ctx);
return AVERROR(EINVAL);
}
if (av_new_packet(pkt, length) < 0) {
unlock_frames(ctx);
return AVERROR(EIO);
}
CMItemCount count;
CMSampleTimingInfo timing_info;
if (CMSampleBufferGetOutputSampleTimingInfoArray(ctx->current_frame, 1, &timing_info, &count) == noErr) {
AVRational timebase_q = av_make_q(1, timing_info.presentationTimeStamp.timescale);
pkt->pts = pkt->dts = av_rescale_q(timing_info.presentationTimeStamp.value, timebase_q, avf_time_base_q);
}
pkt->stream_index = ctx->video_stream_index;
pkt->flags |= AV_PKT_FLAG_KEY;
if (image_buffer) {
status = copy_cvpixelbuffer(s, image_buffer, pkt);
} else {
status = 0;
OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, pkt->data);
if (ret != kCMBlockBufferNoErr) {
status = AVERROR(EIO);
}
}
CFRelease(ctx->current_frame);
ctx->current_frame = nil;
if (status < 0) {
unlock_frames(ctx);
return status;
}
} else if (ctx->current_audio_frame != nil) {
CMBlockBufferRef block_buffer = CMSampleBufferGetDataBuffer(ctx->current_audio_frame);
int block_buffer_size = CMBlockBufferGetDataLength(block_buffer);
if (!block_buffer || !block_buffer_size) {
unlock_frames(ctx);
return AVERROR(EIO);
}
if (ctx->audio_non_interleaved && block_buffer_size > ctx->audio_buffer_size) {
unlock_frames(ctx);
return AVERROR_BUFFER_TOO_SMALL;
}
if (av_new_packet(pkt, block_buffer_size) < 0) {
unlock_frames(ctx);
return AVERROR(EIO);
}
CMItemCount count;
CMSampleTimingInfo timing_info;
if (CMSampleBufferGetOutputSampleTimingInfoArray(ctx->current_audio_frame, 1, &timing_info, &count) == noErr) {
AVRational timebase_q = av_make_q(1, timing_info.presentationTimeStamp.timescale);
pkt->pts = pkt->dts = av_rescale_q(timing_info.presentationTimeStamp.value, timebase_q, avf_time_base_q);
}
pkt->stream_index = ctx->audio_stream_index;
pkt->flags |= AV_PKT_FLAG_KEY;
if (ctx->audio_non_interleaved) {
int sample, c, shift, num_samples;
OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, ctx->audio_buffer);
if (ret != kCMBlockBufferNoErr) {
unlock_frames(ctx);
return AVERROR(EIO);
}
num_samples = pkt->size / (ctx->audio_channels * (ctx->audio_bits_per_sample >> 3));
// transform decoded frame into output format
#define INTERLEAVE_OUTPUT(bps) \
{ \
int##bps##_t **src; \
int##bps##_t *dest; \
src = av_malloc(ctx->audio_channels * sizeof(int##bps##_t*)); \
if (!src) { \
unlock_frames(ctx); \
return AVERROR(EIO); \
} \
\
for (c = 0; c < ctx->audio_channels; c++) { \
src[c] = ((int##bps##_t*)ctx->audio_buffer) + c * num_samples; \
} \
dest = (int##bps##_t*)pkt->data; \
shift = bps - ctx->audio_bits_per_sample; \
for (sample = 0; sample < num_samples; sample++) \
for (c = 0; c < ctx->audio_channels; c++) \
*dest++ = src[c][sample] << shift; \
av_freep(&src); \
}
if (ctx->audio_bits_per_sample <= 16) {
INTERLEAVE_OUTPUT(16)
} else {
INTERLEAVE_OUTPUT(32)
}
} else {
OSStatus ret = CMBlockBufferCopyDataBytes(block_buffer, 0, pkt->size, pkt->data);
if (ret != kCMBlockBufferNoErr) {
unlock_frames(ctx);
return AVERROR(EIO);
}
}
CFRelease(ctx->current_audio_frame);
ctx->current_audio_frame = nil;
} else {
pkt->data = NULL;
unlock_frames(ctx);
if (ctx->observed_quit) {
return AVERROR_EOF;
} else {
return AVERROR(EAGAIN);
}
}
unlock_frames(ctx);
} while (!pkt->data);
return 0;
}
static int avf_close(AVFormatContext *s)
{
AVFContext* ctx = (AVFContext*)s->priv_data;
destroy_context(ctx);
return 0;
}
static const AVOption options[] = {
{ "list_devices", "list available devices", offsetof(AVFContext, list_devices), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
{ "video_device_index", "select video device by index for devices with same name (starts at 0)", offsetof(AVFContext, video_device_index), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "audio_device_index", "select audio device by index for devices with same name (starts at 0)", offsetof(AVFContext, audio_device_index), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "pixel_format", "set pixel format", offsetof(AVFContext, pixel_format), AV_OPT_TYPE_PIXEL_FMT, {.i64 = AV_PIX_FMT_YUV420P}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM},
{ "framerate", "set frame rate", offsetof(AVFContext, framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "ntsc"}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
{ "video_size", "set video size", offsetof(AVFContext, width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
{ "capture_cursor", "capture the screen cursor", offsetof(AVFContext, capture_cursor), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
{ "capture_mouse_clicks", "capture the screen mouse clicks", offsetof(AVFContext, capture_mouse_clicks), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
{ "capture_raw_data", "capture the raw data from device connection", offsetof(AVFContext, capture_raw_data), AV_OPT_TYPE_BOOL, {.i64=0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
{ "drop_late_frames", "drop frames that are available later than expected", offsetof(AVFContext, drop_late_frames), AV_OPT_TYPE_BOOL, {.i64=1}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
{ NULL },
};
static const AVClass avf_class = {
.class_name = "AVFoundation indev",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
};
const FFInputFormat ff_avfoundation_demuxer = {
.p.name = "avfoundation",
.p.long_name = NULL_IF_CONFIG_SMALL("AVFoundation input device"),
.p.flags = AVFMT_NOFILE,
.p.priv_class = &avf_class,
.priv_data_size = sizeof(AVFContext),
.read_header = avf_read_header,
.read_packet = avf_read_packet,
.read_close = avf_close,
};
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